A Near-Infrared Spectroscopic Study of Young Field Ultracool Dwarfs: Additional Analysis

TL;DR

This paper enhances the classification system for young ultracool dwarfs by analyzing effects of binarity, metallicity, and comparing models to observations, providing refined tools for spectral and gravity classification.

Contribution

It offers additional analysis and validation of the spectral classification system, including effects of binarity, metallicity, and model comparisons, expanding its applicability.

Findings

Binarity and metallicity influence spectral classification.

Comparison of models with observed spectra improves classification accuracy.

Classification system validated with Pleiades brown dwarfs.

Abstract

We present additional analysis of the classification system presented in Allers & Liu (2013). We refer the reader to Allers & Liu (2013) for a detailed discussion of our near-IR spectral type and gravity classification system. Here, we address questions and comments from participants of the Brown Dwarfs Come of Age meeting. In particular, we examine the effects of binarity and metallicity on our classification system. We also present our classification of Pleiades brown dwarfs using published spectra. Lastly, we determine SpTs and calculate gravity-sensitive indices for the BT-Settl atmospheric models and compare them to observations.